1. (a.) Serving for trial; probationary.

2. (a.) Pertaining to, or serving for, proof.

Cyrenaic Eleatic Epicurean Megarian Stoic animist animistic atomistic cosmotheistic cut-and-try eclectic eudaemonistic existential experiential experimental factual hedonic hedonist hedonistic heuristic hit-or-miss humanist humanistic idealistic instrumentalist materialistic mechanistic metaphysical monistic naturalistic nominalist observed panlogistical pantheistic pilot positivist positivistic practical pragmatic pragmatist probationary probative probatory proving provisional rationalistic realist realistic scholastic sensationalistic syncretistic tentative test testing theistic transcendentalist transcendentalistic trial trial-and-error trying utilitarian verificatory vitalistic voluntarist voluntaristic